10 remarkable Arctic birds: Yellow-billed loon

10 remarkable Arctic birds

Yellow-billed loon

The largest species of loon, this bird sports a light yellow bill — thus the name — with striking white spots on a black background. During the non-breeding season, it's much less noticeable because it molts to a light brown color.

"They're eye-catchingly beautiful,” Senner said. “They are also incredible vocalists, with their songs and displays often audible for miles around."